I am feeling badly for you. I wish you all the best, but don't let this business suck all your money and life away. Working at a Roland dealership means you were on the feeding end of the equation. Now you are on the other side. It is a tough, long haul, and if you don't know much about signs and the business you should put your plans on hold and go to work for one for a few years. Really get an idea how things work, instead of trying to figure everything out with all your savings and family on the line.
If it was easy, everyone would buy some equipment and be financially on top. This is far from the way it works.